Allentown, United States
Welder Training & Testing Institute (WTTI) offers weld training, weld testing, and welder certification, along with NDT inspection and CWI Inspection. Founded in 1968, WTTI has been serving the domestic and international welding industry. They provide classes such as MT/PT Level I & II, CWI Prep Course, Radiographic Inspector Level II, and Ultrasonic Inspector Level I. WTTI is located at 1144 N. Graham Street in Allentown, PA, with contact information including a telephone number of 610-820-9551 and a fax number of 610-820-0271. In February 2026, WTTI added the WPQ1 Endorsement to its accreditations.
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